Alert archive / California / Mesoscale Discussions in 2005

Mesoscale Discussion 169

February 19, 2005Orange County, California

The Storm Prediction Center issued this mesoscale discussion at Feb 19, 2005, 4:53 AM PST for Orange County, California. It was in force for 2 hr.

The area

The outline as issued.

The facts

Issued
Feb 19, 2005, 4:53 AM PST (12:53 UTC)
Expired
Feb 19, 2005, 7:00 AM PST
In force
2 hr
Issued by
the Storm Prediction Center

County Orange County, CA

The nearest sounding before it

San Diego, CA (KNKX), launched 12:00Z, 0.9 hours before the alert went out and 104 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.

Skew-T log-pSkew-T log-p diagram, San Diego, CA at 12:00Z on 2005-02-19Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 323 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, San Diego, CA at 12:00Z on 2005-02-19The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 131 square meters per square second.1939587897Sfc1 km3 km6 km9 kmRMLM
The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.
Mixed-layer CAPE
323 J/kg
Mixed-layer CIN
-12 J/kg
Mixed-layer LCL
629 m above ground
0-6 km bulk shear
40 kt
0-1 km storm-relative helicity
131 m²/s²
0-3 km storm-relative helicity
163 m²/s²
Significant tornado parameter
0.2
Supercell composite
1.0

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

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SPC that day

Everything else SPC issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Feb 19, 3:22 PM PSTMesoscale DiscussionSPCImperial83 min

Nearby

Mesoscale Discussions in California, 2005Every mesoscale discussion in 2005

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive.